AD7920 250 kSPS、12位ADC，采用6引脚SC70封装

AD7920: 250 kSPS、12位ADC，采用6引脚SC70封装

AD7910/AD7920 分别是10位和12位高速、低功耗、逐次逼近型ADC,采用2.35 V至5.25 V单电源供电,最高吞吐量达250 kSPS。这些器件内置一个低噪声、宽带宽采样/保持放大器,可处理6 MHz以上的输入频率。转换过程和数据采集过程通过CS和串行时钟进行控制,从而为器件与微处理器或DSP接口创造了条件。输入信号在CS的下降沿进行采样,而转换同时在此处启动。该器件无流水线延迟。AD7910/AD7920采用先进的设计技术,可在高吞吐量的情况下实现极低的功耗。基准电压从V DD获得,从而为ADC提供了最宽的动态输入范围,因此,其模拟输入范围为0至V DD.。转换速率取决于SCLK。

Theare 10-bit and 12-bit, high speed, low power, successive-approximation ADCs respectively. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 250 kSPS. The parts contain a low-noise, wide bandwidth track/hold amplifier, which can handle input frequencies in excess of 6 MHz.The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and the conversion is also initiated at this point. There are no pipelined delays associated with the part.

The AD7910/AD7920 use advanced design techniques to achieve very low power dissipation at high throughput rates.The reference for the part is taken internally from VDD. This allows the widest dynamic input range to the ADC. Thus the analog input range for the part is 0 to VDD. The conversion rate is determined by the SCLK.

AD7920 特性

Throughput Rate: 250 kSPS
Specified for VDD of 2.35 V to 5.25 V
Low Power:
- 3 mW typ at 250 KSPS with 3 V Supplies
- 12.5 mW typ at 250 KSPS with 5 V Supplies
Wide Input Bandwidth:- 70 dB SNR at 100 kHz Input Frequency
No Pipeline Delays
Flexible Power/Serial Clock Speed Management
High Speed Serial Interface SPI®/QSPI™/MICROWIRE™/DSP Compatible
Standby Mode: 1 µA max
6-Lead SC70 Package
8-Lead µSOIC Package
吞吐量：250 kSPS
额定电压（V DD）：2.35 V至5.25 V
低功耗：
- 3 mW（典型值,250 KSPS、3 V电源）
- 12.5 mW（典型值,250 KSPS、5 V电源）
宽输入带宽：- 信噪比70 dB（100 kHz输入频率）
无流水线延迟
灵活的功耗/串行时钟速度管理
高速串行接口：SPI®/QSPI™/MICROWIRE™/DSP兼容
待机模式：最大1 µA
6引脚SC70封装
8引脚µSOIC封装

AD7920 技术指标

Resolution (Bits): 12bit
# Chan: 1
Sample Rate: 250kSPS
Interface: Ser,SPI
Analog Input Type: SE-Uni
Ain Range: Uni Vdd
ADC Architecture: SAR
Pkg Type: SC70,SOP

AD7920 建议配套产品

Recommended Input Buffer Amplfiers for the AD7920
- For high performance, high speed applications, we recommend the AD8021 or the ADA4899-1.
- For high performance, lower speed applications, we recommend the ADA4000-1 or the AD8610.
Recommended Precision References for the AD7920
- For a low power, 5V supply source, we recommend the REF195.
- For a low power, 3V supply source, we recommend the REF193.
Recommended Power Solutions
- For selecting voltage regulator products, use ADIsimPower.
- For selecting supervisor products, use the Supervisor Parametric Search.

AD7920 功能框图

AD7920 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD7920AKSZ-500RL7	量产	6 ld SC70	6	工业
AD7920AKSZ-REEL7	量产	6 ld SC70	6	工业
AD7920BKSZ-500RL7	量产	6 ld SC70	6	工业
AD7920BKSZ-REEL	量产	6 ld SC70	6	工业
AD7920BKSZ-REEL7	量产	6 ld SC70	6	工业
AD7920BRMZ	量产	8 ld MSOP	8	工业
AD7920BRMZ-REEL	量产	8 ld MSOP	8	工业
AD7920BRMZ-REEL7	量产	8 ld MSOP	8	工业
EVAL-AD7920CBZ	量产	评估板	-	待定